import Vue from "vue";
import Router from "vue-router";
import routes from "./routers";
import store from "@/store";
import iView from "iview";
import { getToken, canTurnTo } from "@/libs/util";

Vue.use(Router);
const router = new Router({
  routes,
  mode: "history"
});
const LOGIN_PAGE_NAME = "login";

router.beforeEach((to, from, next) => {
  iView.LoadingBar.start();
  const token = getToken();
  if (!token && to.name !== LOGIN_PAGE_NAME) {
    // 未登录且要跳转的页面不是登录页
    next({
      name: LOGIN_PAGE_NAME // 跳转到登录页
    });
  } else if (!token && to.name === LOGIN_PAGE_NAME) {
    // 未登陆且要跳转的页面是登录页
    next(); // 跳转
  } else if (token && to.name === LOGIN_PAGE_NAME) {
    // 已登录且要跳转的页面是登录页
    next({
      name: "home" // 跳转到home页
    });
  } else {
    store.dispatch("getUserInfo").then(user => {
      // 拉取用户信息，通过用户权限和跳转的页面的name来判断是否有权限访问;access必须是一个数组，如：['super_admin'] ['super_admin', 'admin']
      if (canTurnTo(to.name, user.access, routes)) next();
      // 有权限，可访问
      else next({ replace: true, name: "error_401" }); // 无权限，重定向到401页面
    });
  }
});

router.afterEach(to => {
  iView.LoadingBar.finish();
  window.scrollTo(0, 0);
});

export default router;
